Boot looping on Raspberry Pi Zero W


#1

I am having a weird boot looping issue on a Raspberry Pi Zero W. When the device is powered via USB, everything seems fine. When the device was powered using a battery power source through an AdaFruit PowerBoost 1000C, the particle-agent service crashes while booting, thus causing and endless boot loop. I am having difficulty getting meaningful information from the logs (though I can certainly post them.) There are some errors related to resolving the hostname for my device’s Particle endpoint. I thought I could resolve them by changing the init.d script to required-start networking. My theory was that powering the Pi via battery was causing WiFi signal strength issues. I am having a hard time determining the specific conditions that are causing the boot looping issues other than the power source, which causes the issues sometimes. Does anyone have any suggestions?


#2

Can the pi boot and run off the battery when using fresh Raspbian?


#3

EDIT: No, you are correct. It’s not booting with particle-agent uninstalled. Must be a power issue.

Yes. It can also run just fine when I disable particle-agent in systemd. It seems to be running OK when I modify the init script to require networking, though this may be a fluke since particle-agent still starts before dhcpcd, etc. I’ll give it more rigorous testing and rebooting tomorrow.

As a side note I did have an issue with some firmware locking up. Pretty sure it was bad library code. In any case, after the firmware locks up, if I reboot the Pi then particle-agent will once again force one reboot during startup before settling down again. I know that particle agent is supposed to make a Pi behave more like an IoT device that doesn’t require user intervention, but as far as development is concerned it would be nice to have some options to boot into a “safe” mode where the agent doesn’t automatically restart firmware that didn’t exit gracefully.


#4

It looks like no logs are written when the boot looping issue occurs, only when particle-agent successfully starts. I checked this by clearing out my /var/log/particle-agent.log file, allowed the device to boot loop a few times, then let it startup normally from USB power. Only one startup log sequence was present (based on system timestamps.)